Curtain controller



FIG. 1 is a perspective view of a curtain controller my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear perspective view of the curtain controller showing my new design.

The broken lines represent portions of the curtain controller that form no part of the claimed design. 

CLAIM The ornamental design for a curtain controller, as shown and described. 